Chemistry Definitions Advanced Quiz 2
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Advanced Quiz 2
1. What is the main principle behind NMR spectroscopy?
Nuclei in a magnetic field absorb and re-emit electromagnetic radiation at characteristic frequencies
Electrons jump between energy levels
Atoms emit visible light when excited
2. What is the difference between a sigma (σ) and a pi (π) bond?
A sigma bond is formed by head-on overlap; a pi bond by sideways overlap of orbitals
A sigma bond is weaker than a pi bond
There is no difference
3. What is the definition of a rate-determining step?
The slowest step in a reaction mechanism that determines the overall rate
The fastest step in a reaction
The step with the most products
4. What is the Born-Haber cycle used for?
Calculating lattice energy of ionic solids
Measuring boiling point
Determining solubility
5. What is the definition of a Lewis acid?
A substance that can accept a pair of electrons
A substance that donates a pair of electrons
A substance that donates protons
6. What is the definition of a conjugate base?
The species formed after an acid donates a proton
The species formed after a base accepts a proton
A molecule with a double bond
7. What is the definition of a colligative property?
A property that depends only on the number of solute particles, not their identity
A property that depends on the type of solute
A property that depends on temperature only
8. What is the definition of a galvanic cell?
An electrochemical cell that generates electrical energy from spontaneous redox reactions
A cell that requires electrical energy to drive a reaction
A cell that only contains water
9. What is the definition of a standard electrode potential?
The voltage of a half-cell under standard conditions relative to the standard hydrogen electrode
The voltage of a cell at any condition
The energy required to ionize an atom
10. What is the definition of a chelating agent?
A ligand that can form more than one bond to a single metal ion
A molecule that only forms single bonds
A type of acid
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